By Timileyin Ilesanmi
A WhatsApp conversation can create a legally binding agreement in Nigeria. The law does not require a printed contract, wax seal, or physical signature before parties become bound; it asks whether they reached a clear agreement, intending to be legally bound.
The practical risk is that people often treat WhatsApp as informal. A supplier may quote a price, a buyer may reply “deal,” payment may be made, and delivery may follow. If the transaction later breaks down, those messages may become the principal evidence of what was agreed.
Will an exchange of WhatsApp messages satisfy the requirements of a valid contract, and can it be enforced in court? The medium is not decisive. What matters is whether the communication contains a definite offer, unqualified acceptance, consideration, intention to create legal relations, and contractual capacity.
Nigerian courts apply the same contract-formation principles to electronic communications as to face-to-face or written agreements. In Enemchukwu v. Okoye (2017) 6 NWLR (Pt. 1560) 37, the Court of Appeal restated that a valid contract requires offer, acceptance, consideration, intention to create legal relations, and capacity; if any element is absent, no binding contract arises.
Offer and acceptance
An offer must be clear enough that a reasonable person understands the terms on which the offeror is prepared to be bound. It should identify, at minimum, the subject matter, price or consideration, and any essential conditions. A message such as “I will supply 200 bags of cement at N9,000 per bag, delivery within seven days after payment” may be an offer.
Acceptance must correspond with the offer. A reply of “I accept,” “send account details,” or an unequivocal instruction to proceed may amount to acceptance. However, a counteroffer—such as “I can only pay N8,500 per bag”—does not accept the original offer; it rejects it and proposes new terms.
Acceptance may also be inferred from conduct. In Orient Bank (Nig.) Plc v Bilante International Ltd (1997) 8 NWLR (Pt. 515) 37, the Supreme Court considered the formation of contractual relations and expressly stated that acceptance can be inferred from conduct in appropriate circumstances. Thus, paying the agreed deposit after receiving a WhatsApp quotation may evidence acceptance, even without a formal signed contract.
Consideration and intention
Consideration is the value exchanged between the parties. It may be money, goods, services, a promise to pay, or a promise to perform an obligation. A WhatsApp agreement to supply goods for payment will usually satisfy this requirement once one party promises payment and the other promises delivery.
The parties must also intend to create legal relations. Commercial dealings are generally presumed to be intended to have legal effect, while casual social arrangements may not be. A WhatsApp exchange between friends about lending money may still be contractual if the language, payment, and conduct show a serious commercial arrangement rather than a social favour.
Capacity and legality remain essential. The parties must be adults with legal capacity, and the subject matter must be lawful. A WhatsApp agreement for an illegal transaction cannot be enforced, regardless of how clearly it was made.
Proving the WhatsApp agreement
The greater difficulty is often evidential, not contractual. A party relying on WhatsApp messages must prove that the messages are authentic, complete, and admissible. Section 84 of the Evidence Act 2011 governs statements contained in documents produced by computers, including messages stored on mobile phones.
Under section 84(2), the party tendering the evidence must establish matters such as regular use of the device, proper operation of the device, and the ordinary course of activity from which the information was supplied. Section 84(4) permits a certificate to be filed in support of the electronic evidence. The Supreme Court affirmed the importance of these requirements in Kubor v. Dickson (2013) 4 NWLR (Pt. 1345) 534.
In practice, a party should preserve the phone, retain the original chat, avoid editing or selectively screenshotting messages, and be prepared to explain how the messages were obtained and maintained. Courts may admit WhatsApp evidence where these foundational requirements are met.
Limits and caution
Some transactions require more than a WhatsApp exchange. Land transactions, certain corporate approvals, wills, powers of attorney, and other formal instruments may require written documentation, signatures, consent, registration, or compliance with specific statutes. A WhatsApp message may evidence negotiations or part-performance, but it may not by itself satisfy those statutory formalities.
There is also a difference between an agreement and a complete agreement. Messages showing an agreement “in principle,” subject to contract, board approval, due diligence, or a formal contract, may not be enforceable until those conditions are fulfilled. Vague messages such as “we will work together” are less likely to create binding obligations than messages fixing price, quantity, delivery date, and payment terms.
Final note
Treat important WhatsApp negotiations as potentially contractual. State terms clearly, avoid ambiguous replies, confirm the final terms in writing, and retain the complete conversation. For significant transactions, follow up with a formal agreement that consolidates the WhatsApp terms, identifies the parties, and provides for signatures, dispute resolution, and governing law.
A WhatsApp conversation can bind you just as effectively as a signed document. The safest approach is simple: do not type anything into a chat that you would not be prepared to defend in court.